Honors Chem Unit 4

Periodic Trends

100

The element of the following with the highest ionization energy:

Na
Al
Mg
S

Sulfur

200

The largest atomic radius out of the following elements:

Ga
B
Al

What is Gallium?

300

The element with the highest electronegativity of the following elements:

Si
N
Ga
O

What is Oxygen?

400

This element would have the highest ionization energy in Period 2. 

What is Neon?

500

Elements X and Y are in the same group. X is in period 1 and Y is in period 5. Why does Y have a lower ionization energy than X

As you move down the group, Y is larger than X, so it is easier to remove the electron because of the larger distance

Bonding #1

100

What type of bond exists when potassium and oxygen combine?

ionic bonds

200

What type of bond is formed when two atoms share electrons to form a molecule

Covalent bond

300

Name one property to you would predict a substance would have if it was made from an alkali metal and a halogen?

high melting point

brittle

can't conduct as solid

can conduct when dissolved in water

400

Why do metallic bonds have the property of malleability?

Delocalized/mobile electrons

500

What type of bond would not conduct electricity as a solid, but will in the aqueous (dissolved in water) state?

Ionic bonds

Bonding #2

100

In a bond between P and O, which atom do the electrons move closer to AND why?

closer to 0 because it is more electronegative

200

Define a nonpolar covalent bond

Two nonmetals sharing electrons equally because they have the same electronegativities

300

What is the driving force in a polar covalent bond

differences in electronegativity

400

The electronegativity of element A is 4.0, the electronegativity of element B is 3.1. What type of bond do they form?

polar covalent

500

A student measured the melting points of four different solids. Based on the data below, which is most likely to be covalent?

A) 130

B) 850

C) 1200

A

VSEPR

100

The bond angle of carbon dioxide.

What is 180?

200

The geometry of PCl₃?

What is trigonal pyramidal?

300

How do lone pairs affect the bond angle

They minimize the bond angle

400

The geometry of CF₄.

tetrahedral

500

The geometry of SO₃?

What is trigonal planar?

Lewis Structures

100

Draw the ionic lewis structure for MgO

Mg +2 [ O ] -2 (8 dots around O)

200

Draw a lewis structure for NF₃

see board

300

Draw a lewis structure for SCl₂; indicate whether it is polar or nonpolar

see board

polar

400

Why is CH₄ nonpolar but CH₃Cl polar?

CH₄ has no lone pairs and all atoms bonded to the center atom are the same, not all the atoms are the same on CH₃Cl

500

Which molecule below is the only one that is nonpolar?

CH_4, SCl₂, CH₃Cl

CH₄